PDF malware analysis — malicious · 62079be7db88209e

MALICIOUS

PDF

81.7 KB Created: 2021-09-01 01:25:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 5c9e60d4729f872623e290ff7eea11bf SHA-1: 8b085e85aad166b4176de4c90ce95d79ba883e51 SHA-256: 62079be7db88209ef10028c2ca2cc09429dc8fe33499ef23a090bbdf254419b3

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, directing users to multiple distinct hosts, many of which appear to be compromised WordPress sites. The presence of embedded URLs and the heuristic firings strongly suggest an attempt to redirect users to malicious content, likely for phishing or further malware delivery.

Machine Learning

Nyx PDF Classifier suspicious score 0.4862

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
External URI info PDF_URI

PDF contains an external URL action
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://szerecsen.hu/editor_up/97482505840.pdf In PDF document text
- https://rafaela-motores.com/userfiles/file/41781630811.pdfIn PDF document text
- http://traktorpulling.de/ablage/userfiles/files/97597323017.pdfIn PDF document text
- http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/262295ef235b8e42239ac9c5fd646a28/28763118459.pdfIn PDF document text
- https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/413f89a021dfe7939fd4f2db92ce2e74/1552887730.pdfIn PDF document text
- https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fc99e462ac6---zukumokojadujomudoraj.pdfIn PDF document text
- https://www.explosivo.gr/wp-content/plugins/super-forms/uploads/php/files/760a4ad942cc810c54ed0a5da969ca28/29323438045.pdfIn PDF document text
- https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612189d8802d4---xoxedineferiragafejaloz.pdfIn PDF document text
- http://mdtrend.hu/files/file/soxenotuvorovuk.pdfIn PDF document text
- https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a50d9ec72447f3485cde90beb7c8e49e/zixisovozowaru.pdfIn PDF document text
- http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160766b61b30bf---gutotonutedidi.pdfIn PDF document text
- https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/529bdbc1c3c484a25ee767c1a840fbfa/voxugufisowodiwuv.pdfIn PDF document text
- http://huiking.cn/uploads/file/160201501791.pdfIn PDF document text
- http://ahxxzx.com/userfiles/202106/file/14787905350.pdfIn PDF document text
- http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4daf4d5f2---74180326742.pdfIn PDF document text
- http://alexlunacoach.com/img/editor/file/lefiraluzafugag.pdfIn PDF document text
- https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609d94ef73ab1---bozofowatebawiwabure.pdfIn PDF document text
- http://willbramephotography.com/8399768422.pdfIn PDF document text
- https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/e6bd84bbac4ab46048d8394389f50ec0/16424937805.pdfIn PDF document text
- http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/20161932635.pdfIn PDF document text
- https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/a90aa4444c1efc48a29b2dbb48c73649/vodogobidemuseketado.pdfIn PDF document text
- https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/ivv3bqicfrvdtg3moufb0p7p04/mojalomogifuguwejudujeg.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=stock+confirmation+letter+formatPDF link annotation
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000108ac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x108AC	10496 bytes
SHA-256: `a98b881e2ddca9cb5d240ccf2c2e33ff83072fb04af1fb2fd312fbfc8fe15f6c`
`font_01_sfnt_off0001208b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1208B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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